Electrically-operated locking device for elevators



2 Sheets-Sheet 1'.

(No Model.)

T.v W. JENKINS. BLEOTRIOALLY OPERATED LOCKING DEVIOBFOR ELEVATORS.

PatentedJuly 27, 1897. I

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(Ho Modl.) 2 SheetsSheet 2.

, v T. W. JENKINS. BLEGTRIGALLY OPERATED LOCKING DEVICE FOR ELEVATORS.

No. 587,002. Patented July 27, 1897.

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UNITED STATES PATENT OFFICE.

THOMAS W. JENKINS, OF PHILADELPHIA, PENNSYLVANIA.

ELECT RICALLY-OPERATED LOCKING DEVICE FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 587,002, dated July27', 1897.

Application filed October 2,1895. Serial No. 564,867. (No model.)

To all whom it may concern:

Be it known that I, THOMAS W. JENKINS, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvement in Electrically-OperatedLocking Devices for Elevators, which improvement is fully set forth inthe following specification and accompanying drawings.

. circuit.

Myinvention has for its object the locking of the power-controllingmechanism of an elevator when the door of the car is opened and the caris ata landing and which cannot be released until said door is closed;and for this purpose it consists of novel mechanism hereinafterdescribed, said 'mechanism being in an electric circuit which is adaptedto be closed and broken by the operation of the door.

It further consists of novel means forlocking the door of the frame ofthe elevator-well and the unlocking of the same by the action of the carwhen it has reached its destination.

Figure 1 represents a partial front elevation and partial verticalsection of portions of an elevator embodying my invention. Fig. 2represents a side elevation of a portion thereof. Fig. 3 represents aperspective view of a detached portion. Fig. 4-, represents a face Viewof a detached portion. Fig. 5 represents a side elevation of forms ofcontacts that may be employed. Fig. 6 represents a partial frontelevation and partial vertical section of an elevator embodying myinvention, the power-controlling mechanism being of a diiferent formfrom that shown in Fig. 1. Fig. 7 represents a side elevation of part ofthe frame. Fig. 8 represents a vertical section of upper and lower endsof one side of the car, showing beveled ends and groove for passage ofthe sliding rod for completing the Similar letters of reference indicatecorresponding partsin the several figures.

Referring to the drawings, Adesignates the car ofan elevator, and Bdesignates the stationary frame of the well thereof.

0 designates the door of the car, the same being adapted to open andclose, as usual.

D designates the power-controlling wheel on the car A, the said wheelhaving a recess E in the periphery of the disk or hub portion F thereof,said recess being adapted to receive the head G of the dog H, which isfitted in the guide J on the car and pivotally connected with the leverK, the outer end of which carries the armature L, adjacent to which isthe magnet M, said lever and armature being carried by the car.

WVires or conductors N are connected with 'fully reached a floor, havethe spools Q Q ride over and in contact with the same, said spools andplates thus serving as contacts, as shown Fig. 2. 7

Wires or conductors U are connected with the plates T and with thebracket V and battery W. Mounted in the bracket is a springpressed rodor bar V, which carries the contact-piece X, the latter being adapted tobe moved to and from the contact-piece X,

A which is secured to the bracket or bindingpost X it being noticed thatthe brackets V and X and the battery W are mounted on the frame B, andthe rod V is so located that it is adapted to be engaged by the sideedge of the door 0 when the latter is closed. The lower edge of the cageis rounded or beveled at a, and the topof the door at b, so as toprevent any catching of the rod V and said door.

Y designates a wire or conductor which is connected with the bracket orbinding-post X andwith the battery WV.

Mounted on the frame B, below the door S thereof, is a dog Z, the lowerend of which is connected with one of the spring-plates T and has itsupper end or nose adapted to engage with said door and lock the same,which is the normal position and action of said dog.

The operation is as follows: WVhen the car rises and reaches the floor,the spools Q press against the spring-plates T and cause the dog Z toleave the door S and thus unlock the latter. The door 0 is opened, asusual, and the rod V, which has been held back by the door in closedposition, new advances and causes the pieces X and X to contact, thuscompleting or closing the electric circuit, whereby the armature L isattracted, and the lever K causes the dog II to rise and have its noseenter the recess E of the wheel D, thus locking said wheel, so that thecar cannot be started until said wheel is properly released, which canonly be occasioned by the closing of the door 0, whereby the car canonly move with a closed door.

\Vhen it is desired to start the car, the door 0 is closed, whereby itpresses against the rod V, and the latter then separates thecontactpieces X X and breaks the circuit. This releases the armature L,and as a consequence the dog II drops, its nose leaves the recess E, andthe wheel D is unlocked, whereby said wheel may be turned to cause thestarting of the car. As soon as the spools leave the springs T thelatter expand, and the dog has its head or nose thrown into engagementwith the door S, so that the latter islocked from the inside of the welland can only be opened when the springs are again engaged by the spoolson the moving car,whcreby the dogLis forced from said door, so that thelatter may be opened from within the ear. \Vhen the car reaches itsdestination, the door thereof is opened, so that the electric circuit isagain closed, and the wheel D is then looked, so that the car cannot bemoveduntil said door is fully closed, when the circuit is broken and thewheel is unlocked similar to that hereinbefore stated.

In Fig. 5 I show shoes Q in lieu of the spools Q, the same beingemployed for forming or closing the circuit when the car reaches itsdestination similar to said spools.

\Vhen a le\'er,such as A,is employed in lieu of the wheel D, the samehas connected with it the vertically-sliding bar or rod 13, whose headis adapted to enter the recess 0 in the quadrant D on the car. The lowerend of the bar engages with one end of the lever E,

whose other end carries the armature F, below which is the magnet G, itbeing evident that when the armature is attracted, due to a closedcircuit, the bar B is raised and caused to engage with the quadrant D,thus locking said lever A. \Vhen the circuit is broken, the armature isreleased, so that the bar is permitted to fall and disengage from thequadrant, whereby the lever A is unlocked, and the car may be set inmotion by the operation of the lever A.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In electrically-operating locking devices for elevators, a car with apower-controlling wheel and a door, a lock for said wheel, an electriccircuit with magnet controlling said lock, and contact-points connectedby the action of said door, said parts being combined substantially asdescribed.

2. In an elevator, a car having a door and a power-controlling mechanismwith a locking device, an armature connected with said device, and amagnet for said armature, in combination with an electric circuit,having contact-pieces and means operated by the movement of said doorfor connecting said contacts and thereby closing said circuit, saidparts being combined substantially as described.

In an elevator, the power-controlling mechanism on the car thereof, adog adapted to lock said mechanism, an armature connected to said dog,and a magnet adjacent to said armature in combination with a rod adaptedto engage the door of the car, a contact-piece on said rod, acontact-piece adjacent to the first-named piece, an electric circuit,said armature and contact-pieces being in said electric circuit which isformed by conductors, part of which are carried by the car and part bythe frame of the well, and contacts on said car and frame for closingsaid circuit, substantially as described.

at. In an elevator, at car having a door and a power-controlling device,a locking-dog on said car for said cont-rolling device, an electriccircuit withcontact-points supported by the frame of the elevator-well,means on said car for connecting said contact-points, and a magnet withwires adapted to be connected with said circuit, said magnet controllingan armature connected with said locking-dog, said parts being combined,substantially as described.

5. In an elevator, a car having a door and a power-controlling device, alocking-dog for said device, and a magnet for controlling said dog,insulated spools on said car connected with said magnet, anelevator-well frame having a door and provided with spring-plates,adapted to be engaged by said spools, a dog connected to one of saidspring-plates and en gaging said door on said well-frame, an electriccircuit connected with said spring-plates, and having contact-points formaking and breaking the circuit, and a springcontrolled rod carrying oneof said contact-points, said rod being engaged by the door of the car,said parts being combined substantially as described.

6. In an elevator, a car having insulated shoes thereon, a well-framehaving an electric circuit having contact-pieces for said shoes, a dooron said frame, and a lock on said contaetepieces adapted to be operatedby the shoe for releasing said lock when said car has reached its floor,in combination with means on the car for locking the power-controllingmechanism thereon, said means being in the electric circuit of whichsaid contact-pieces form part, substantially as described.

'II'IOS. IV. JENKINS. lVitnesses:

JOHN A. WIEDERsnnm, E. II. FAIRBANKS.

